Shelving unit



FIG. 1 is a perspective view of a shelving unit showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an enclosed elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a shelving unit, as shown and described. 